Place cranberries, pomegranate juice, white sugar, brown sugar, orange zest, and salt in a medium saucepan and bring to a boil over medium heat. Cook, stirring occasionally, until berries start to pop, about 10 minutes. Remove from heat, stir in pomegranate seeds, and let cool for 30 minutes. Adjust consistency with water, if needed. Serve immediately or place in an airtight container and store in the refrigerator for up to two weeks, reheating prior to serving.